import React, { Component } from 'react'
import PropTypes from 'prop-types'
import './index.css'
import { nanoid } from 'nanoid'

class Index extends Component {
  static propTypes = {
    addTodo: PropTypes.func.isRequired
  }
  handleKeyUp = (event) => {
    const { addTodo } = this.props
    const { keyCode, target } = event
    if (keyCode !== 13) {
      return
    }
    if (target.value.trim() === '') {
      return alert('输入不能为空!')
    }
    const obj = {
      id: nanoid(),
      name: target.value,
      done: false
    }
    addTodo(obj)
    target.value = ''
  }
  render() {
    return (
      <div className="todo-header">
        <input
          type="text"
          onKeyUp={this.handleKeyUp}
          placeholder="请输入你的任务名称，按回车键确认"
        />
      </div>
    )
  }
}

export default Index
